Re: Removing Drag and Drop formatting of drop area in Python/GTK3

[Marco Scannadinari]

  border-width=0px;

This should be a colon not an equals sign
style_provider.load_from_data(bytes(css.encode()))

.encode already returns a bytes object in Python 3, what version are you
using?

On Mon, 19 Oct 2015 13:09 Lukasz Grabowski  wrote:

> When implementing drag and drop in Python and GTK3 the default
> behaviour is that if I drag something towards the drop area, then the
> drop area obtains a rectangular black frame. How to remove this
> effect?
>
> As per gtk3 docs, there is a style class GTK-STYLE-CLASS-DND 'dnd', so
> I would think that adding
>
> 
> style_provider = Gtk.CssProvider()
> css="""
> .dnd {
>   border-width=0px;
> }"""
> style_provider.load_from_data(bytes(css.encode()))
>
> Gtk.StyleContext.add_provider_for_screen(
> Gdk.Screen.get_default(),
> style_provider,
> Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION )
> 
>
> or similar to the program should do the trick. But I had no luck with
> it. I kept changing other properties within the .dnd block to see if
> it has any effect at all but it doesn't (otherwise CSS works fine,
> e.g. if I change .dnd to :hover then the effect is as expected).
>
> Best, Lukasz
>
> P.S. Just in case I'm using a wrong tool: I'm trying to implement
> selecting several widgets ("calendar cells") in a Gtk.Grid via draging
> the mouse across them, similar to google calendar. I'd like to have
> the same formatting of all cells which are being selected (which is
> why I don't want any special dnd formatting on the last cell)
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>
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Re: How ot remove the minimize and maximize button of GtkWindow

[Marco Scannadinari]

On Fri, 2014-02-21 at 09:18 +0100, David Nečas wrote:
 On Fri, Feb 21, 2014 at 03:29:07PM +0800, Wiky wrote:
   The default GtkWindow has a minimize , a maximize and a close button in 
  the right or left top coner.
  But I want a window which only has a close button. How can I remove the 
  minimize and maximize button?
 
 You can't.  In my window manager the windows may have a completely
 different set of buttons.  Or no title bar at all.  Or whatever.  And
 the window manager has the last word.
 
 You can override the decoration-button-layout style property, but you
 need 3.10+ and it will only work in something like GNOME 3 anyway.
 
 The meaningful thing you can do is setting the window type hint with
 gdk_window_get_type_hint() (and possibly other hints) to specify what
 the window *is* instead, and let the window manager treat it
 appropriately and consistently with other widows with the same role.
 
 Yeti
 

Alternatively, you could create a GtkBox that contains a close GtkButton
and a centred GtkLabel as the title, set it as the titlebar with
gtk_window_set_titlebar(), then connect clicked to gtk_main_quit() or
something, though its a very hacky solution, and IDK if it will handle
dragging the window with the mouse.
-- 
Marco Scannadinari m...@scannadinari.co.uk

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Re: How to locate the 'Gtk-WARNING' line number

[Marco Scannadinari]

On Mon, 2014-02-17 at 16:44 +0800, Wiky wrote:
  Hi,all. I'm currently writing a program based Gtk+-3.0.
 When it runs, I get '(a.out:10874): Gtk-WARNING **: Failed to ...' in the 
 terminal.
 I know the problem is about GtkLabel, but I really don't know which GtkLabel.
 Is there a way to locate the line numer that give the warning?
 
 Sorry for my english
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If your UI is hand-coded, and in main() (not using GtkApplication), then
I suppose you can run it through gdb and step through each line to see
where it prints the error. Be sure to compile with -Og -g and without
optimisations though
-- 
Marco Scannadinari m...@scannadinari.co.uk

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